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    The dome of a residential tower is in the form of a hemisphere with a radius of 560 cm. Find the cost of painting it at the rate of Rs. 25 per m²
    Question

    The dome of a residential tower is in the form of a hemisphere with a radius of 560 cm. Find the cost of painting it at the rate of Rs. 25 per m².

    A.

    Rs. 4,928

    B.

    Rs. 4,982

    C.

    Rs. 4,298

    D.

    Rs. 4,289

    Correct option is A

    Given:
    Shape of the dome: Hemisphere
    Radius r = 560 cm
    Cost of painting per square meter = Rs. 25
    Formula Used:
    Curved Surface Area of Hemisphere:
    CSA = 2πr22 \pi r^2​​
    Cost of Painting:
    Cost = CSA in m2×Rate per m2\text{CSA in m}^2 \times \text{Rate per m}^2​​
    1 m2=10,000 cm21 \text{ m}^2 = 10,000 \text{ cm}^2 ​​
    Solution:

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